An annual cycle of vitellogenesis in the elasmobranch Scyliorhinus canicula
An annual cycle of vitellogenesis in the elasmobranch Scyliorhinus canicula
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软骨鱼类卵黄发生的年度周期
DOI：
10.1017/s0025315400041369
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发表时间：
1978
影响因子：
1.2
通讯作者：
J. Craik
中科院分区：
文献类型：
--
作者：
J. Craik
成年雌性蛇尾全年血浆卵黄原蛋白合成持续，但3 - 8月的合成率明显低于其他时间。肝体指数（肝脏重量占体重的百分比）在两性中每年都有变化，但这种变化在女性中更为明显。雌性肝体指数的升高伴随着肝脏脂质百分比的升高，主要是由肝脏总脂质含量的升高引起的。男性和女性肝脏的比较表明，脂质百分比没有显著差异，而不溶于水和有机溶剂的固体百分比在女性中较大。根据在输卵管中产卵的雌性的百分比，产卵全年持续，在9月至10月达到最低。在7月至10月期间，与卵黄形成相关的参数开始从各自的年度最低点恢复，顺序如下：血浆雌二醇水平、肝体指数、血浆卵黄原蛋白合成率、性体指数、血浆卵黄原蛋白水平、产卵率。
Plasma vitellogenin synthesis in adult female Scyliorhinus canicula L. continued throughout the year but the rate of synthesis was significantly lower between March and August than during the rest of the year. The hepatosomatic index (liver weight as percentage of body weight) underwent annual variation in both sexes but this variation was considerably more pronounced in the female. Increase in hepatosomatic index in the female was accompanied by increase in the percentage of lipid in the liver and was largely caused by increase in the total lipid content of the liver. Comparison of livers of males and females showed that the percentage of lipid was not significantly different while the percentage of solids insoluble in water and organic solvents was greater in the female. Oviposition, as indicated by the percentage of females with eggs in the oviducts, continued throughout the year, reaching a minimum in September-October. Between July and October, parameters associated with vitellogenesis began recovery from their respective annual minima in the following order: plasma oestradiol level, hepatosomatic index, rate of synthesis of plasma vitellogenin, gonosomatic index, plasma vitellogenin level, rate of oviposition.